Electrical-arc lamp.



No. 707,383. Patented Aug. l9, I902.

C. L. BUNDY.

ELECTRIC ARC LAMP.

(Application filed Feb. 12, 1902.

(No Model.) 2 Sheets-Sheet L in: mmms Pzmas'co, vuovcwmu wAskmoToN, 0 c.

N0. 707,383. Patented Aug. l9, I902.

C. L. BUNDY.

ELECTRIC ARC LAMP.

(Application filed Feb. 12, 1902.)

(No Model.)

2 Shets-Sheet 2.

THE Nonms PEYERS co. moraumou WASHKNGTON. o. c.

UNITED STATES PATENT OFFICE.

CLIFTON L. BUNDY, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO HIMSELF AND ALBERT II. MANWARING, OF PHILADELPHIA, PENN- SYLVANIA, COPARTNERSHIP, TRADING AS PHILADELPHIA ELEC- TRICAL AND MANUFACTURING COMPANY.

ELECTRIC-ARC LAM P.

SPECIFICATION forming part of Letters Patent No. 707,383, dated August 19, 1902. Application filed February 12,1902- Serial No. 93,709 (No model.)

To all whom it may concern:

Be it known that I, CLIFTON L. BUNDY, a citizen of the United States, residing in Philadelphia, Pennsylvania, have invented certain Improvements in Arc-Lamps, of which the following is a specification.

My invention relates to certain improvem ents in electric-arc lamps. As shown in the accompanying drawings, my improved lamp has been designed to employ flat carbons. It will be understood, however, that I may use round carbons with but slight modification of the connecting parts and without departing from my invention.

The details of my invention will be more fully pointed out hereinafter, reference being had to the accompanying drawings,in which- Figure 1 is a sectional elevation of my improved lamp, showing the frame, magnets, armature, resistance-coils, and carbon-holders. Fig. 2 is a sectional elevation looking in the direction of the arrow, Fig. 1. Fig. 3 is a View of the upper part of the lamp similar to Fig. 1 and illustrating a slight change in a detail of construction. Fig. 4: is a diagram view showing a portion of the lamp structure developed in order to illustrate clearly the wiring of the lamp. Fig. 5 is a sectional plan view taken on the line a a, Fig. 1. Fig. 6 is a sectional plan view taken on the line Z) Z9, Fig. 1; and Figs. 7 to 13 are detached views illustrating details of my invention.

My invention comprises several important details of construction in connection with arelamps, whereby I am enabled to vary the attractive force of the magnets and regulate the resistance of the coils interposed in the lampcircuit, comprising also an automatic cut-out to act when the armature is raised too high, special clutch mechanism arranged between the armature and the carbon-rod, whereby the latter may be raised to strike the proper arc, and a special form of contact-brush carried by the frame to engage the carbon-rod.

My improved lamp is fully shown in the accompanying drawings and consists of the top frame 1, to which the magnets, resistancecoils, binding-posts, &c., are secured in any suitable manner, a spider 2, in which is arranged the mechanism operated by the armature, and the carbon-supporting frame 3, carried by the spider 2. The frame 1 and spider 2 are connected together by a pipe 4., having its ends threaded into sockets in the frame and spider or otherwise secured thereto.

The frame 1 carries at the top the bindingposts 5 and 6, the supporting eye 7, and switch-arm 8, and below this frame are the magnets 9 and 10 and the resistance-coils 11 and 12, the latter being disposed upon opposite sides of the magnets. As indicated in the-drawings, the magnet 10 is wound with heavier wire than the magnet 9.

Pivoted to the core 13 of the magnet 9 is the armature 14:, which is movable from and toward the core 15 of the magnet 10. When the magnets are energized, the magnet 10 being wound with heavier wire receives a higher voltage than the magnet 9 and overcoming the power of the same raises the armature to the position shown by dotted lines in Figs. 1, 3, and 4.

To regulate the quantity of current flowing to the carbons, I purpose to vary the attractive force of the magnets, and to this end I provide means for varying the distance between the cores of the same. In Figs. 1 and 3 I have shown screws 16 passing through the cores 13 and 15 and bearing against the tubular portion 4 of the lamp, connecting the top frame and the spider 2. These screws are adjustable from and toward said tube 4.

Passing through the center of the spider 2 from within the tube 4 is the carbon-rod 17, to the lower end of which the upper-carbon holder 18 is secured. Surrounding the rod 17 and disposed, preferably, within the spider 2 is the clutch-sleeve 19, to which is pivoted a clutch-arm 20, connected by a link 21 with a lever 22, pivoted at 23 to the spider, which lever 22 in turn is connected with the armature 14. by a link 24. When upon the energizing of the magnets the armature is drawn into the position shown by dotted lines in Figs. 1, 3, and 4:, the sleeve 19 will be one of the side rods 34, which rods are carsition shown by dotted lines in Fig. 1 (after clutched to the rod 17 by the arm 20, andsaid rod 17 will be raised, carrying with it the up per-carbon holder 18 and carbon 25, and thereby striking the arc.

The carbon-rod 17 passes through a combination-bushing 27, (clearly shown in Figs. 1, 3, and 4 and in perspective View in Fig. 11,) which bushing is threaded onto the end of the tube 4 projecting through the spider 2. This bushing carries the contact-brush 28, embracing the carbon-rod 17, the bushing being reduced to receive the brush, as shown in Fig. 11, the latter being held to the bushing by a screw 29.

The upper-carbon holder 18 is provided with a clamping or set screw 31, whereby the carbon may be held in place, and a guidearm 32, having a recessed end 33, engaging ried by the spider 2 and serve to support the lower-carbon holder 35. The upper-carbon holder is clearly shown in the perspective view Fig. 12.

The lower-carbon holder supports the lower carbon 36, and said holder is carried by the arms 37, secured to the lower ends of the rods 34 by means of the nuts 38, one of said arms being insulated from one of the rods 34 by means of the bushing and collar 39. A detail view of the lower-carbon holder in section is clearly shown in Fig. 13. It will be noted that the walls of the holder 35 are tapered and that two binding or set screws are provided in order that the lower carbon may be accurately centered with relation to the upper carbon. It will also be noticed that one of the carbons is considerably thicker than the other. As shown in the present instance, the upper carbon is thicker.

At the lower part of the carbon-supporting frame 3 I provide a pan 41 to catch the dust, pieces, or particles that may break away from the carbons. This pan is clearly shown in, Figs. 1, 2, 4, and 13. It is hinged at 42 to one of the arms 37, so that it may drop to the pothe globe has been removed) when it is desired to remove such dust and dirt. A catch 43 is employed to secure the pan in place, such catch having a spring 44, mounted on one of the arms or bars 37, which is held by the screw 45. The magnets 9 and 10 are carried by a yokepiece 46, suitably secured to the top frame 1 and clearly shown in Fig. 5, such yoke-piece having the removable member 47, whereby it may be placed in position on the rod or tube 4, connecting the top frame 1 and spider 2. The magnets are in electrical connection with this yoke-piece and are held thereto by means of screws or bolts 48, passing into the cores of the magnets. Disposed on either side of the magnets 9 and 10 are the resistance-coils 11 and 12, which are supported in suitable frames 49 and 50, respectively, carried by and in electrical connection with the top frame 1.

I prefer to employ the form of clutch-sleeve illustrated in Figs. 1 and 3 and also in the diagram Fig. 4; but in Figs. 7 and 8 I have shown a modification in which the clutch member 20 is pivoted to a bell-crank lever 81, connected to the usual link 21, said bellcrank lever being pivoted to the clutch-sleeve 19. In Fig. 3 I have illustrated a modified form of connection between the armature and the collar 19, comprising the single link 21. This link, as well as the links 21, (illustrated in Figs. 1 and 3,) is provided with the adjustable nuts 26, having right and left handed threads. Instead of a connection in which the linkis adjustable Imayprovide the screwcollar or bushing 60, threaded into the spider 2, as clearly shown in Fig. 10, the upper surface ofsaid bushing bearing against the under side of the cl utch-sleeve 19. \Vith a structure of this character I employ a simple link 21 connected at one end to the clutch member 20 and at the opposite end to the armature 14.

The armature which I prefer to use is clearly shown in the plan view Fig. 9, comprising the side bars and end bars 56, which parts are secured together by suitable screws 57. Such armature is provided with a pivot-pin 58, whereby it may be mounted on the core 13 of the magnet 12.

In Fig. 4 I have shown as developed the various connections of the magnets, resistance-coils, and binding-posts necessary for operating the lamp. The binding-posts 5 and (i are insulated from the frame 1 by means of the insulated bushings 51, interposed between said binding-posts and the frame 1, and setscrews 52 are employed to secure the terminal wires to said binding-posts.

With my improved form of lamp I provide an adjustable resistance-coil 11 and a fixed resistance-coil12, the former having a sliding contact 53, which is used as a variable shunt around the main magnet 10. The wire from the binding-post 5 is connected to' one end of the shunt resistance-coil l1, and the other end of the coil is attached to the frame 49, which carries said coil and ,which is in electrical connection in the present instance with the yoke-piece 46, carrying the magnets, and hence with the frame of the lamp.- By moving the sliding contact 53 the lifting power of the magnet 10 may be varied according to the amount of current passing through the shunt. The current passes, as clearly shown in Fig. 4, from the binding-post 5 through the wire on magnet 10, of which the inner end is connected to the metallic core 15, through said core to the yoke-piece 46, (clearly shown in the plan View Fig. 5,) thence to the pipe or tube 4, combination-bushing 27, and contact-brush 28. From the contactbrush 28 the current passes to the carbon-rod 17, carbon-holder 18, and to the carbons 25 and 36, thence to the carbon-holder 35, to one of the side rods of the carbon-holding frame 3, to the wire secured to the binding-post 82 at the top of said rod, and thence to the binding-post 6, completing the lighting-circuit.

IIO

The automatic cut-out consists of the contacts 61 and 62, (clearly shown in Fig. 4,) attached to but insulated from the yoke-piece 46. Resting on these contacts 61 and 62 is the shoe 63, which is controlled by a rod 64, pivotally mounted at 65 to the armature 14. The rodb'a passes through an opening in the yoke-piece 16 and, fitting the same comparatively snugly, is in electrical connection therewith. This rod is insulated from the shoe 63 by means of the bushing 83. The contact 61 is carried up and over one end of the shoe 63. Another contact, 66, in electrical connection with the yoke-piece 4:6, is carried up over the opposite end of the shoe 63, and each of these contacts 61 and (36 carry the adjustable screws (57, which may be readily placed in any position, so that when from any cause the armature is carried too high for a normal are contact will be made with said shoe 63, shortcircuiting the main magnet 10 and causing the armature to drop sufficiently to again establish a normal arc.

When the armature is down, as shown by the full lines in Fig. 4:, the circuit is estab lished through the cut-out contact 61, which is connected to the binding-post 5, shoe 63, cut-out contact 62, resistance-coil 12, to binding-post 6. It will be readily seen, therefore, that when the magnets are energized and lift the armature to the position shown in dotted lines in Fig. 4 the shoe 63 will be lifted from the cut-out contacts 61 and 62, occupying a mid-position between the same and the contacts 67, and the current will flow through the carbons 25 and 36.

In Figs. 1, 2, and 3 I have shown a sectional view of the inclosing casing 68, which may be secured in any suitable manner to the upper frame 1. This casing extends below the upper-carbon holder, and at 69 fastenings are provided to secure the globe 70 in place. These fastenings are of such a character that the globe may be readily detached from its position at any time. In order to support the globe when the carbons are being replaced, I provide the book '71, carried by one of the arms 37 of the lower-carbon holder, as clearly shown in Fig. 1.

Having thus described my invention, I claim and desire to secure by Letters Patent 1. The combination in an arc-lamp, of the carbons, a vertically-movable rod, a connection between said rod and the upper carbon, magnets, an armature pivotally connected to the core of one of said magnets, said armature arranged to rise when the magnets are energized, and a clutch between said armature and the vertically-movable rod whereby the movement of the upper carbon may be varied to strike the proper arc, said clutch consisting of a split collar surrounding the vertically-movable rod, and a pivoted member carried by said collar and adapted to engage the rod, said member being connected to the armature and engaging said rod when the armature is moved.

2. In an arc-lamp of the character described, the combination of the magnets supported at one end by connections entering their cores, and means for varying the voltage of the arc, said means serving to vary the distance between the cores of the magnets at the free ends of the same.

3. In an arc -lamp of the character described, the combination of the magnets supported at the top by connections entering their cores, and means for varying the voltage of the arc, said means consisting of adjusting devices carried by the lower ends of the magnet-cores and serving to vary the distance between the cores at the free ends of the same.

4. The combination in an arc-lamp, of the frame, magnets secured thereto by connections entering the cores of the same, a centrallydepending member, and adjustingscrews passing through the cores of said magnets at their lower ends and bearing upon said depending member, said cores serving to vary the distance between the cores of the magnets at their lower ends only thereby varying the voltage of the arc.

5. In an arc-lamp, the combination of the carbons, a fixed support for the lower carbon, an adjustable support for the upper carbon, a carbon-rod attached to said adjustable support, magnets, an armature pivotally mounted on the core of one of said magnets and movable from and toward the other magnet, and a clutch connection provided with an adjusting-nut arranged between said armature and the carbon-rod, said clutch consisting of a split collar surrounding the verticallymovable rod, and a pivoted member carried by said collar and adapted to engage the rod, said member being connected to the armature, and engaging said rod when the armature is moved.

6. The combination in an arc-lamp, of the carbon-holding frame, a clamping-support for the lower carbon secured to said frame, and binding-screws carried by said support for securing the carbon thereto, said holder having tapered inner walls whereby the carbon carried thereby may be adjusted by said binding-screws with relation to the other carbon.

7. The combination in an arc-lamp, of the carbons, a frame in which said carbons are supported, a holder for the upper carbon, a binding-screw carried thereby for securing the carbon therein, said holder being vertically movable, side rods connecting the carbon -holding frame together, and a guide piece or arm carried by the upper-carbon holder and having a forked end engaging one of said rods.

8. The combination in an arc-lamp, of the magnets, an armature, cut-out contacts carried by the lamp-frame and properly insulated l' therefrom, a shoe for engaging said contacts vertically-movable connection between said armature and the shoe, said connection being pivotally mounted on said members, and adjustable engaging means carried by said outout contacts.

10. The combination in an arc-1am p, of the frame, magnets carried thereby, an armature, cut-out contacts carried by the lamp-frame, a short-circuiting member adapted to engage said cut-out contacts, a vertically-moving pivotal connection between said member and the armature whereby said member is positively moved as the armature rises and falls, a coil of fixed resistance, and a coil of adjustable resistance arranged in the lamp-circuit, substantially as and for the purpose set forth.

11. The combination in an arc-lamp, of the carbons, magnets, connections between said carbons and magnets, resistance-coils carried by the lamp-frame, auxiliary brackets in which said coils are mounted, a movable con tact carried by one of said coils whereby a shunt-circuit may be established around the main magnets, a rod carried by the auxiliary frames to which said movable contact is ad apted, and means for adjusting said contact on its supporting-rod.

12. The combination in an arc-lamp of the character described, of the carbon-holding frame, a support for the lower-carbon holder, a dust-pan hinged to one side of said support and at the outside of the carbonholding frame, and a spring-catch carried by the opposite side of said support for holding the dust-pan in position, said dust-pan having forked ends which pass on either side of the carbon-holding frame.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

CLIFTON L. BUNDY.

Witnesses:

ll/IURRAY 0. Bowen, Jos. H. KLEIN. 

